Product Description
Interstate-McBee M-3008400 Vacuum Pump Mounting Gasket – 89–02 5.9L Cummins 12V/24V
OEM-style vacuum pump mounting gasket for 1989–2002 Dodge Ram 2500/3500 with the 5.9L Cummins (12-valve & 24-valve). Built to factory dimensions for a direct fit at the pump-to-engine/gear-housing interface. Ideal for pump service or reseal jobs where a new gasket is required.
- Direct-fit replacement: Installs in the stock location to restore factory sealing.
- OEM-equivalent specs: Matches Cummins reference 3008400 for proper alignment and seal.
- Service best practice: Replace whenever the vacuum pump is removed (single-use gasket).
- Aftermarket value: Interstate-McBee quality at a budget-friendly price point.
Specifications
| Brand | Interstate-McBee |
|---|---|
| Part Number | M-3008400 |
| OEM Reference | Cummins 3008400 |
| Additional Cross-Refs | Mopar 04638531; Cummins 3938655 |
| Position | Vacuum pump to engine/gear housing mounting |
| What’s Included | (1) Vacuum pump mounting gasket |
Vehicle Fitment
Always confirm by engine serial number (ESN) if possible.
- Dodge Ram 2500/3500 – 5.9L Cummins
- 1989–1993 12-Valve (6BT)
- 1994–1998 12-Valve (6BT)
- 1998.5–2002 24-Valve (ISB)
Install Notes
- Clean both mating surfaces thoroughly; remove old gasket material without scratching the housing.
- This is a single-use gasket—replace any time the vacuum pump is removed.
- Follow Cummins service manual for torque sequence/specs; use sealant only where the manual specifies.
Why Buy From CPP Diesel
- ESN-verified fitment support from real diesel techs.
- Fast shipping and easy returns.
- Deep 5.9L B-Series parts selection for one-trip shopping.
FAQ
Will this fit both 12-valve and 24-valve 5.9L Cummins?Yes. It’s listed for 1989–2002 Dodge 5.9L Cummins applications covering both 12V and 24V engines.
Is this the same as Cummins 3008400?
Functionally equivalent aftermarket replacement for Cummins 3008400. Cross-refs include Mopar 04638531 and Cummins 3938655.
Do I need to replace the gasket every time the pump comes off?
Yes. This is a one-time-use gasket—replace after any pump removal to ensure proper sealing.
Do I need RTV or sealant?
Use only as specified in the Cummins service manual. Most installations rely on the gasket alone for sealing.
Product Videos
Custom Field
YEAR 1989-2002
MAKE DODGE
ENGINE 5.9L
